Move sources to correct directory

1 files changed, 1321 insertions, 0 deletions

diff --git a/twin/compton-tde/compton.h b/twin/compton-tde/compton.h
new file mode 100644
index 000000000..dfdbe53d3
--- /dev/null
+++ b/twin/compton-tde/compton.h
@@ -0,0 +1,1321 @@
+/**
+ * compton.h
+ */
+
+// Throw everything in here.
+
+
+// === Includes ===
+
+#include "common.h"
+
+#include <math.h>
+#include <sys/select.h>
+#include <limits.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <locale.h>
+#include <signal.h>
+
+#include <sys/types.h>
+#include <pwd.h>
+
+#ifdef CONFIG_VSYNC_DRM
+#include <fcntl.h>
+// We references some definitions in drm.h, which could also be found in
+// /usr/src/linux/include/drm/drm.h, but that path is probably even less
+// reliable than libdrm
+#include <drm.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#endif
+
+// == Functions ==
+
+// inline functions must be made static to compile correctly under clang:
+// http://clang.llvm.org/compatibility.html#inline
+
+// Helper functions
+
+static void
+discard_ignore(session_t *ps, unsigned long sequence);
+
+static void
+set_ignore(session_t *ps, unsigned long sequence);
+
+/**
+ * Ignore X errors caused by next X request.
+ */
+static inline void
+set_ignore_next(session_t *ps) {
+  set_ignore(ps, NextRequest(ps->dpy));
+}
+
+static int
+should_ignore(session_t *ps, unsigned long sequence);
+
+/**
+ * Reset filter on a <code>Picture</code>.
+ */
+static inline void
+xrfilter_reset(session_t *ps, Picture p) {
+  XRenderSetPictureFilter(ps->dpy, p, "Nearest", NULL, 0);
+}
+
+/**
+ * Subtract two unsigned long values.
+ *
+ * Truncate to 0 if the result is negative.
+ */
+static inline unsigned long __attribute__((const))
+sub_unslong(unsigned long a, unsigned long b) {
+  return (a > b) ? a - b : 0;
+}
+
+/**
+ * Set a <code>bool</code> array of all wintypes to true.
+ */
+static inline void
+wintype_arr_enable(bool arr[]) {
+  wintype_t i;
+
+  for (i = 0; i < NUM_WINTYPES; ++i) {
+    arr[i] = true;
+  }
+}
+
+/**
+ * Set a <code>switch_t</code> array of all unset wintypes to true.
+ */
+static inline void
+wintype_arr_enable_unset(switch_t arr[]) {
+  wintype_t i;
+
+  for (i = 0; i < NUM_WINTYPES; ++i)
+    if (UNSET == arr[i])
+      arr[i] = ON;
+}
+
+/**
+ * Check if a window ID exists in an array of window IDs.
+ *
+ * @param arr the array of window IDs
+ * @param count amount of elements in the array
+ * @param wid window ID to search for
+ */
+static inline bool
+array_wid_exists(const Window *arr, int count, Window wid) {
+  while (count--) {
+    if (arr[count] == wid) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+/**
+ * Convert a geometry_t value to XRectangle.
+ */
+static inline XRectangle
+geom_to_rect(session_t *ps, const geometry_t *src, const XRectangle *def) {
+  XRectangle rect_def = { .x = 0, .y = 0,
+    .width = ps->root_width, .height = ps->root_height };
+  if (!def) def = &rect_def;
+
+  XRectangle rect = { .x = src->x, .y = src->y,
+    .width = src->wid, .height = src->hei };
+  if (src->wid < 0) rect.width = def->width;
+  if (src->hei < 0) rect.height = def->height;
+  if (-1 == src->x) rect.x = def->x;
+  else if (src->x < 0) rect.x = ps->root_width + rect.x + 2 - rect.width;
+  if (-1 == src->y) rect.y = def->y;
+  else if (src->y < 0) rect.y = ps->root_height + rect.y + 2 - rect.height;
+  return rect;
+}
+
+/**
+ * Convert a XRectangle to a XServerRegion.
+ */
+static inline XserverRegion
+rect_to_reg(session_t *ps, const XRectangle *src) {
+  if (!src) return None;
+  XRectangle bound = { .x = 0, .y = 0,
+    .width = ps->root_width, .height = ps->root_height };
+  XRectangle res = { };
+  rect_crop(&res, src, &bound);
+  if (res.width && res.height)
+    return XFixesCreateRegion(ps->dpy, &res, 1);
+  return None;
+}
+
+/**
+ * Destroy a <code>Picture</code>.
+ */
+inline static void
+free_picture(session_t *ps, Picture *p) {
+  if (*p) {
+    XRenderFreePicture(ps->dpy, *p);
+    *p = None;
+  }
+}
+
+/**
+ * Destroy a <code>Pixmap</code>.
+ */
+inline static void
+free_pixmap(session_t *ps, Pixmap *p) {
+  if (*p) {
+    XFreePixmap(ps->dpy, *p);
+    *p = None;
+  }
+}
+
+/**
+ * Destroy a <code>Damage</code>.
+ */
+inline static void
+free_damage(session_t *ps, Damage *p) {
+  if (*p) {
+    // BadDamage will be thrown if the window is destroyed
+    set_ignore_next(ps);
+    XDamageDestroy(ps->dpy, *p);
+    *p = None;
+  }
+}
+
+/**
+ * Destroy a condition list.
+ */
+static inline void
+free_wincondlst(c2_lptr_t **pcondlst) {
+#ifdef CONFIG_C2
+  while ((*pcondlst = c2_free_lptr(*pcondlst)))
+    continue;
+#endif
+}
+
+/**
+ * Free Xinerama screen info.
+ */
+static inline void
+free_xinerama_info(session_t *ps) {
+#ifdef CONFIG_XINERAMA
+  if (ps->xinerama_scr_regs) {
+    for (int i = 0; i < ps->xinerama_nscrs; ++i)
+      free_region(ps, &ps->xinerama_scr_regs[i]);
+    free(ps->xinerama_scr_regs);
+  }
+  cxfree(ps->xinerama_scrs);
+  ps->xinerama_scrs = NULL;
+  ps->xinerama_nscrs = 0;
+#endif
+}
+
+/**
+ * Check whether a paint_t contains enough data.
+ */
+static inline bool
+paint_isvalid(session_t *ps, const paint_t *ppaint) {
+  // Don't check for presence of Pixmap here, because older X Composite doesn't
+  // provide it
+  if (!ppaint)
+    return false;
+
+  if (bkend_use_xrender(ps) && !ppaint->pict)
+    return false;
+
+#ifdef CONFIG_VSYNC_OPENGL
+  if (BKEND_GLX == ps->o.backend && !glx_tex_binded(ppaint->ptex, None))
+    return false;
+#endif
+
+  return true;
+}
+
+/**
+ * Bind texture in paint_t if we are using GLX backend.
+ */
+static inline bool
+paint_bind_tex_real(session_t *ps, paint_t *ppaint,
+    unsigned wid, unsigned hei, unsigned depth, bool force) {
+#ifdef CONFIG_VSYNC_OPENGL
+  if (!ppaint->pixmap)
+    return false;
+
+  if (force || !glx_tex_binded(ppaint->ptex, ppaint->pixmap))
+    return glx_bind_pixmap(ps, &ppaint->ptex, ppaint->pixmap, wid, hei, depth);
+#endif
+
+  return true;
+}
+
+static inline bool
+paint_bind_tex(session_t *ps, paint_t *ppaint,
+    unsigned wid, unsigned hei, unsigned depth, bool force) {
+  if (BKEND_GLX == ps->o.backend)
+    return paint_bind_tex_real(ps, ppaint, wid, hei, depth, force);
+  return true;
+}
+
+/**
+ * Free data in a reg_data_t.
+ */
+static inline void
+free_reg_data(reg_data_t *pregd) {
+  cxfree(pregd->rects);
+  pregd->rects = NULL;
+  pregd->nrects = 0;
+}
+
+/**
+ * Free paint_t.
+ */
+static inline void
+free_paint(session_t *ps, paint_t *ppaint) {
+  free_texture(ps, &ppaint->ptex);
+  free_picture(ps, &ppaint->pict);
+  free_pixmap(ps, &ppaint->pixmap);
+}
+
+/**
+ * Free w->paint.
+ */
+static inline void
+free_wpaint(session_t *ps, win *w) {
+  free_paint(ps, &w->paint);
+  free_fence(ps, &w->fence);
+}
+
+/**
+ * Destroy all resources in a <code>struct _win</code>.
+ */
+static inline void
+free_win_res(session_t *ps, win *w) {
+  free_region(ps, &w->extents);
+  free_paint(ps, &w->paint);
+  free_region(ps, &w->border_size);
+  free_paint(ps, &w->shadow_paint);
+  free_damage(ps, &w->damage);
+  free_region(ps, &w->reg_ignore);
+  free(w->name);
+  free(w->class_instance);
+  free(w->class_general);
+  free(w->role);
+#ifdef CONFIG_VSYNC_OPENGL_GLSL
+  free_glx_bc(ps, &w->glx_blur_cache);
+#endif
+}
+
+/**
+ * Free root tile related things.
+ */
+static inline void
+free_root_tile(session_t *ps) {
+  free_picture(ps, &ps->root_tile_paint.pict);
+  free_texture(ps, &ps->root_tile_paint.ptex);
+  if (ps->root_tile_fill)
+    free_pixmap(ps, &ps->root_tile_paint.pixmap);
+  ps->root_tile_paint.pixmap = None;
+  ps->root_tile_fill = false;
+}
+
+/**
+ * Get current system clock in milliseconds.
+ */
+static inline time_ms_t
+get_time_ms(void) {
+  struct timeval tv;
+
+  gettimeofday(&tv, NULL);
+
+  return tv.tv_sec % SEC_WRAP * 1000 + tv.tv_usec / 1000;
+}
+
+/**
+ * Convert time from milliseconds to struct timeval.
+ */
+static inline struct timeval
+ms_to_tv(int timeout) {
+  return (struct timeval) {
+    .tv_sec = timeout / MS_PER_SEC,
+    .tv_usec = timeout % MS_PER_SEC * (US_PER_SEC / MS_PER_SEC)
+  };
+}
+
+/**
+ * Whether an event is DamageNotify.
+ */
+static inline bool
+isdamagenotify(session_t *ps, const XEvent *ev) {
+  return ps->damage_event + XDamageNotify == ev->type;
+}
+
+/**
+ * Create a XTextProperty of a single string.
+ */
+static inline XTextProperty *
+make_text_prop(session_t *ps, char *str) {
+  XTextProperty *pprop = cmalloc(1, XTextProperty);
+
+  if (XmbTextListToTextProperty(ps->dpy, &str, 1,  XStringStyle, pprop)) {
+    cxfree(pprop->value);
+    free(pprop);
+    pprop = NULL;
+  }
+
+  return pprop;
+}
+
+
+/**
+ * Set a single-string text property on a window.
+ */
+static inline bool
+wid_set_text_prop(session_t *ps, Window wid, Atom prop_atom, char *str) {
+  XTextProperty *pprop = make_text_prop(ps, str);
+  if (!pprop) {
+    printf_errf("(\"%s\"): Failed to make text property.", str);
+    return false;
+  }
+
+  XSetTextProperty(ps->dpy, wid, pprop, prop_atom);
+  cxfree(pprop->value);
+  cxfree(pprop);
+
+  return true;
+}
+
+static void
+run_fade(session_t *ps, win *w, unsigned steps);
+
+static void
+set_fade_callback(session_t *ps, win *w,
+    void (*callback) (session_t *ps, win *w), bool exec_callback);
+
+/**
+ * Execute fade callback of a window if fading finished.
+ */
+static inline void
+check_fade_fin(session_t *ps, win *w) {
+  if (w->fade_callback && w->opacity == w->opacity_tgt) {
+    // Must be the last line as the callback could destroy w!
+    set_fade_callback(ps, w, NULL, true);
+  }
+}
+
+static void
+set_fade_callback(session_t *ps, win *w,
+    void (*callback) (session_t *ps, win *w), bool exec_callback);
+
+static double
+gaussian(double r, double x, double y);
+
+static conv *
+make_gaussian_map(double r);
+
+static unsigned char
+sum_gaussian(conv *map, double opacity,
+             int x, int y, int width, int height);
+
+static void
+presum_gaussian(session_t *ps, conv *map);
+
+static XImage *
+make_shadow(session_t *ps, double opacity, int width, int height);
+
+static bool
+win_build_shadow(session_t *ps, win *w, double opacity);
+
+static Picture
+solid_picture(session_t *ps, bool argb, double a,
+              double r, double g, double b);
+
+/**
+ * Stop listening for events on a particular window.
+ */
+static inline void
+win_ev_stop(session_t *ps, win *w) {
+  // Will get BadWindow if the window is destroyed
+  set_ignore_next(ps);
+  XSelectInput(ps->dpy, w->id, 0);
+
+  if (w->client_win) {
+    set_ignore_next(ps);
+    XSelectInput(ps->dpy, w->client_win, 0);
+  }
+
+  if (ps->shape_exists) {
+    set_ignore_next(ps);
+    XShapeSelectInput(ps->dpy, w->id, 0);
+  }
+}
+
+/**
+ * Get the children of a window.
+ *
+ * @param ps current session
+ * @param w window to check
+ * @param children [out] an array of child window IDs
+ * @param nchildren [out] number of children
+ * @return 1 if successful, 0 otherwise
+ */
+static inline bool
+wid_get_children(session_t *ps, Window w,
+    Window **children, unsigned *nchildren) {
+  Window troot, tparent;
+
+  if (!XQueryTree(ps->dpy, w, &troot, &tparent, children, nchildren)) {
+    *nchildren = 0;
+    return false;
+  }
+
+  return true;
+}
+
+/**
+ * Check if a window is bounding-shaped.
+ */
+static inline bool
+wid_bounding_shaped(const session_t *ps, Window wid) {
+  if (ps->shape_exists) {
+    Bool bounding_shaped = False, clip_shaped = False;
+    int x_bounding, y_bounding, x_clip, y_clip;
+    unsigned int w_bounding, h_bounding, w_clip, h_clip;
+
+    XShapeQueryExtents(ps->dpy, wid, &bounding_shaped,
+        &x_bounding, &y_bounding, &w_bounding, &h_bounding,
+        &clip_shaped, &x_clip, &y_clip, &w_clip, &h_clip);
+    return bounding_shaped;
+  }
+
+  return false;
+}
+
+/**
+ * Determine if a window change affects <code>reg_ignore</code> and set
+ * <code>reg_ignore_expire</code> accordingly.
+ */
+static inline void
+update_reg_ignore_expire(session_t *ps, const win *w) {
+  if (w->to_paint && WMODE_SOLID == w->mode)
+    ps->reg_ignore_expire = true;
+}
+
+/**
+ * Check whether a window has WM frames.
+ */
+static inline bool __attribute__((const))
+win_has_frame(const win *w) {
+  return w->a.border_width
+    || w->top_width || w->left_width || w->right_width || w->bottom_width;
+}
+
+static inline void
+wid_set_opacity_prop(session_t *ps, Window wid, opacity_t val) {
+  const unsigned long v = val;
+  XChangeProperty(ps->dpy, wid, ps->atom_opacity, XA_CARDINAL, 32,
+      PropModeReplace, (unsigned char *) &v, 1);
+}
+
+static inline void
+wid_rm_opacity_prop(session_t *ps, Window wid) {
+  XDeleteProperty(ps->dpy, wid, ps->atom_opacity);
+}
+
+/**
+ * Dump an drawable's info.
+ */
+static inline void
+dump_drawable(session_t *ps, Drawable drawable) {
+  Window rroot = None;
+  int x = 0, y = 0;
+  unsigned width = 0, height = 0, border = 0, depth = 0;
+  if (XGetGeometry(ps->dpy, drawable, &rroot, &x, &y, &width, &height,
+        &border, &depth)) {
+    printf_dbgf("(%#010lx): x = %u, y = %u, wid = %u, hei = %d, b = %u, d = %u\n", drawable, x, y, width, height, border, depth);
+  }
+  else {
+    printf_dbgf("(%#010lx): Failed\n", drawable);
+  }
+}
+
+static void
+win_rounded_corners(session_t *ps, win *w);
+
+/**
+ * Validate a pixmap.
+ *
+ * Detect whether the pixmap is valid with XGetGeometry. Well, maybe there
+ * are better ways.
+ */
+static inline bool
+validate_pixmap(session_t *ps, Pixmap pxmap) {
+  if (!pxmap) return false;
+
+  Window rroot = None;
+  int rx = 0, ry = 0;
+  unsigned rwid = 0, rhei = 0, rborder = 0, rdepth = 0;
+  return XGetGeometry(ps->dpy, pxmap, &rroot, &rx, &ry,
+        &rwid, &rhei, &rborder, &rdepth) && rwid && rhei;
+}
+
+/**
+ * Validate pixmap of a window, and destroy pixmap and picture if invalid.
+ */
+static inline void
+win_validate_pixmap(session_t *ps, win *w) {
+  // Destroy pixmap and picture, if invalid
+  if (!validate_pixmap(ps, w->paint.pixmap))
+    free_paint(ps, &w->paint);
+}
+
+/**
+ * Wrapper of c2_match().
+ */
+static inline bool
+win_match(session_t *ps, win *w, c2_lptr_t *condlst, const c2_lptr_t **cache) {
+#ifdef CONFIG_C2
+  return c2_match(ps, w, condlst, cache);
+#else
+  return false;
+#endif
+}
+
+static bool
+condlst_add(session_t *ps, c2_lptr_t **pcondlst, const char *pattern);
+
+static long
+determine_evmask(session_t *ps, Window wid, win_evmode_t mode);
+
+/**
+ * Clear leader cache of all windows.
+ */
+static void
+clear_cache_win_leaders(session_t *ps) {
+  for (win *w = ps->list; w; w = w->next)
+    w->cache_leader = None;
+}
+
+static win *
+find_toplevel2(session_t *ps, Window wid);
+
+/**
+ * Find matched window.
+ */
+static inline win *
+find_win_all(session_t *ps, const Window wid) {
+  if (!wid || PointerRoot == wid || wid == ps->root || wid == ps->overlay)
+    return NULL;
+
+  win *w = find_win(ps, wid);
+  if (!w) w = find_toplevel(ps, wid);
+  if (!w) w = find_toplevel2(ps, wid);
+  return w;
+}
+
+static Window
+win_get_leader_raw(session_t *ps, win *w, int recursions);
+
+/**
+ * Get the leader of a window.
+ *
+ * This function updates w->cache_leader if necessary.
+ */
+static inline Window
+win_get_leader(session_t *ps, win *w) {
+  return win_get_leader_raw(ps, w, 0);
+}
+
+/**
+ * Return whether a window group is really focused.
+ *
+ * @param leader leader window ID
+ * @return true if the window group is focused, false otherwise
+ */
+static inline bool
+group_is_focused(session_t *ps, Window leader) {
+  if (!leader)
+    return false;
+
+  for (win *w = ps->list; w; w = w->next) {
+    if (win_get_leader(ps, w) == leader && !w->destroyed
+        && win_is_focused_real(ps, w))
+      return true;
+  }
+
+  return false;
+}
+
+static win *
+recheck_focus(session_t *ps);
+
+static bool
+get_root_tile(session_t *ps);
+
+static void
+paint_root(session_t *ps, XserverRegion reg_paint);
+
+static XserverRegion
+win_get_region(session_t *ps, win *w, bool use_offset);
+
+static XserverRegion
+win_get_region_noframe(session_t *ps, win *w, bool use_offset);
+
+static XserverRegion
+win_extents(session_t *ps, win *w);
+
+static XserverRegion
+border_size(session_t *ps, win *w, bool use_offset);
+
+static Window
+find_client_win(session_t *ps, Window w);
+
+static void
+get_frame_extents(session_t *ps, win *w, Window client);
+
+static win *
+paint_preprocess(session_t *ps, win *list);
+
+static void
+render(session_t *ps, int x, int y, int dx, int dy, int wid, int hei,
+    double opacity, bool argb, bool neg,
+    Picture pict, glx_texture_t *ptex,
+    XserverRegion reg_paint, const reg_data_t *pcache_reg);
+
+static inline void
+win_render(session_t *ps, win *w, int x, int y, int wid, int hei, double opacity, XserverRegion reg_paint, const reg_data_t *pcache_reg, Picture pict) {
+  const int dx = (w ? w->a.x: 0) + x;
+  const int dy = (w ? w->a.y: 0) + y;
+  const bool argb = (w && w->mode == WMODE_ARGB);
+  const bool neg = (w && w->invert_color);
+
+  render(ps, x, y, dx, dy, wid, hei, opacity, argb, neg,
+      pict, (w ? w->paint.ptex: ps->root_tile_paint.ptex), reg_paint, pcache_reg);
+}
+
+static inline void
+set_tgt_clip(session_t *ps, XserverRegion reg, const reg_data_t *pcache_reg) {
+  switch (ps->o.backend) {
+    case BKEND_XRENDER:
+    case BKEND_XR_GLX_HYBRID:
+      XFixesSetPictureClipRegion(ps->dpy, ps->tgt_buffer.pict, 0, 0, reg);
+      break;
+#ifdef CONFIG_VSYNC_OPENGL
+    case BKEND_GLX:
+      glx_set_clip(ps, reg, pcache_reg);
+      break;
+#endif
+  }
+}
+
+static bool
+xr_blur_dst(session_t *ps, Picture tgt_buffer,
+    int x, int y, int wid, int hei, XFixed **blur_kerns,
+    XserverRegion reg_clip);
+
+/**
+ * Normalize a convolution kernel.
+ */
+static inline void
+normalize_conv_kern(int wid, int hei, XFixed *kern) {
+  double sum = 0.0;
+  for (int i = 0; i < wid * hei; ++i)
+    sum += XFixedToDouble(kern[i]);
+  double factor = 1.0 / sum;
+  for (int i = 0; i < wid * hei; ++i)
+    kern[i] = XDoubleToFixed(XFixedToDouble(kern[i]) * factor);
+}
+
+static void
+paint_all(session_t *ps, XserverRegion region, XserverRegion region_real, win *t);
+
+static void
+add_damage(session_t *ps, XserverRegion damage);
+
+static void
+repair_win(session_t *ps, win *w);
+
+static wintype_t
+wid_get_prop_wintype(session_t *ps, Window w);
+
+static void
+map_win(session_t *ps, Window id);
+
+static void
+finish_map_win(session_t *ps, win *w);
+
+static void
+finish_unmap_win(session_t *ps, win *w);
+
+static void
+unmap_callback(session_t *ps, win *w);
+
+static void
+unmap_win(session_t *ps, win *w);
+
+static opacity_t
+wid_get_opacity_prop(session_t *ps, Window wid, opacity_t def);
+
+static bool
+init_filters(session_t *ps);
+
+/**
+ * Reread opacity property of a window.
+ */
+static inline void
+win_update_opacity_prop(session_t *ps, win *w) {
+  w->opacity_prop = wid_get_opacity_prop(ps, w->id, OPAQUE);
+  if (!ps->o.detect_client_opacity || !w->client_win
+      || w->id == w->client_win)
+    w->opacity_prop_client = OPAQUE;
+  else
+    w->opacity_prop_client = wid_get_opacity_prop(ps, w->client_win,
+          OPAQUE);
+}
+
+static double
+get_opacity_percent(win *w);
+
+static void
+win_determine_mode(session_t *ps, win *w);
+
+static void
+calc_opacity(session_t *ps, win *w);
+
+static void
+calc_dim(session_t *ps, win *w);
+
+static Window
+wid_get_prop_window(session_t *ps, Window wid, Atom aprop);
+
+static void
+win_update_leader(session_t *ps, win *w);
+
+static void
+win_set_leader(session_t *ps, win *w, Window leader);
+
+static void
+win_update_focused(session_t *ps, win *w);
+
+/**
+ * Run win_update_focused() on all windows with the same leader window.
+ *
+ * @param leader leader window ID
+ */
+static inline void
+group_update_focused(session_t *ps, Window leader) {
+  if (!leader)
+    return;
+
+  for (win *w = ps->list; w; w = w->next) {
+    if (win_get_leader(ps, w) == leader && !w->destroyed)
+      win_update_focused(ps, w);
+  }
+
+  return;
+}
+
+static inline void
+win_set_focused(session_t *ps, win *w, bool focused);
+
+static void
+win_on_focus_change(session_t *ps, win *w);
+
+static void
+win_determine_fade(session_t *ps, win *w);
+
+static void
+win_update_shape_raw(session_t *ps, win *w);
+
+static void
+win_update_shape(session_t *ps, win *w);
+
+static void
+win_update_prop_shadow_raw(session_t *ps, win *w);
+
+static void
+win_update_prop_shadow(session_t *ps, win *w);
+
+static void
+win_determine_shadow(session_t *ps, win *w);
+
+static void
+win_determine_invert_color(session_t *ps, win *w);
+
+static void
+win_determine_blur_background(session_t *ps, win *w);
+
+static void
+win_on_wtype_change(session_t *ps, win *w);
+
+static void
+win_on_factor_change(session_t *ps, win *w);
+
+static void
+win_upd_run(session_t *ps, win *w, win_upd_t *pupd);
+
+static void
+calc_win_size(session_t *ps, win *w);
+
+static void
+calc_shadow_geometry(session_t *ps, win *w);
+
+static void
+win_upd_wintype(session_t *ps, win *w);
+
+static void
+win_mark_client(session_t *ps, win *w, Window client);
+
+static void
+win_unmark_client(session_t *ps, win *w);
+
+static void
+win_recheck_client(session_t *ps, win *w);
+
+static bool
+add_win(session_t *ps, Window id, Window prev);
+
+static void
+restack_win(session_t *ps, win *w, Window new_above);
+
+static void
+configure_win(session_t *ps, XConfigureEvent *ce);
+
+static void
+circulate_win(session_t *ps, XCirculateEvent *ce);
+
+static void
+finish_destroy_win(session_t *ps, Window id);
+
+static void
+destroy_callback(session_t *ps, win *w);
+
+static void
+destroy_win(session_t *ps, Window id);
+
+static void
+damage_win(session_t *ps, XDamageNotifyEvent *de);
+
+static int
+xerror(Display *dpy, XErrorEvent *ev);
+
+static void
+expose_root(session_t *ps, XRectangle *rects, int nrects);
+
+static Window
+wid_get_prop_window(session_t *ps, Window wid, Atom aprop);
+
+static bool
+wid_get_name(session_t *ps, Window w, char **name);
+
+static bool
+wid_get_role(session_t *ps, Window w, char **role);
+
+static int
+win_get_prop_str(session_t *ps, win *w, char **tgt,
+    bool (*func_wid_get_prop_str)(session_t *ps, Window wid, char **tgt));
+
+static inline int
+win_get_name(session_t *ps, win *w) {
+  int ret = win_get_prop_str(ps, w, &w->name, wid_get_name);
+
+#ifdef DEBUG_WINDATA
+  printf_dbgf("(%#010lx): client = %#010lx, name = \"%s\", "
+      "ret = %d\n", w->id, w->client_win, w->name, ret);
+#endif
+
+  return ret;
+}
+
+static inline int
+win_get_role(session_t *ps, win *w) {
+  int ret = win_get_prop_str(ps, w, &w->role, wid_get_role);
+
+#ifdef DEBUG_WINDATA
+  printf_dbgf("(%#010lx): client = %#010lx, role = \"%s\", "
+      "ret = %d\n", w->id, w->client_win, w->role, ret);
+#endif
+
+  return ret;
+}
+
+static bool
+win_get_class(session_t *ps, win *w);
+
+#ifdef DEBUG_EVENTS
+static int
+ev_serial(XEvent *ev);
+
+static const char *
+ev_name(session_t *ps, XEvent *ev);
+
+static Window
+ev_window(session_t *ps, XEvent *ev);
+#endif
+
+static void __attribute__ ((noreturn))
+usage(int ret);
+
+static bool
+register_cm(session_t *ps);
+
+inline static void
+ev_focus_in(session_t *ps, XFocusChangeEvent *ev);
+
+inline static void
+ev_focus_out(session_t *ps, XFocusChangeEvent *ev);
+
+inline static void
+ev_create_notify(session_t *ps, XCreateWindowEvent *ev);
+
+inline static void
+ev_configure_notify(session_t *ps, XConfigureEvent *ev);
+
+inline static void
+ev_destroy_notify(session_t *ps, XDestroyWindowEvent *ev);
+
+inline static void
+ev_map_notify(session_t *ps, XMapEvent *ev);
+
+inline static void
+ev_unmap_notify(session_t *ps, XUnmapEvent *ev);
+
+inline static void
+ev_reparent_notify(session_t *ps, XReparentEvent *ev);
+
+inline static void
+ev_circulate_notify(session_t *ps, XCirculateEvent *ev);
+
+inline static void
+ev_expose(session_t *ps, XExposeEvent *ev);
+
+static void
+update_ewmh_active_win(session_t *ps);
+
+inline static void
+ev_property_notify(session_t *ps, XPropertyEvent *ev);
+
+inline static void
+ev_damage_notify(session_t *ps, XDamageNotifyEvent *ev);
+
+inline static void
+ev_shape_notify(session_t *ps, XShapeEvent *ev);
+
+/**
+ * Get a region of the screen size.
+ */
+inline static XserverRegion
+get_screen_region(session_t *ps) {
+  XRectangle r;
+
+  r.x = 0;
+  r.y = 0;
+  r.width = ps->root_width;
+  r.height = ps->root_height;
+  return XFixesCreateRegion(ps->dpy, &r, 1);
+}
+
+/**
+ * Resize a region.
+ */
+static inline void
+resize_region(session_t *ps, XserverRegion region, short mod) {
+  if (!mod || !region) return;
+
+  int nrects = 0, nnewrects = 0;
+  XRectangle *newrects = NULL;
+  XRectangle *rects = XFixesFetchRegion(ps->dpy, region, &nrects);
+  if (!rects || !nrects)
+    goto resize_region_end;
+
+  // Allocate memory for new rectangle list, because I don't know if it's
+  // safe to write in the memory Xlib allocates
+  newrects = calloc(nrects, sizeof(XRectangle));
+  if (!newrects) {
+    printf_errf("(): Failed to allocate memory.");
+    exit(1);
+  }
+
+  // Loop through all rectangles
+  for (int i = 0; i < nrects; ++i) {
+    int x1 = max_i(rects[i].x - mod, 0);
+    int y1 = max_i(rects[i].y - mod, 0);
+    int x2 = min_i(rects[i].x + rects[i].width + mod, ps->root_width);
+    int y2 = min_i(rects[i].y + rects[i].height + mod, ps->root_height);
+    int wid = x2 - x1;
+    int hei = y2 - y1;
+    if (wid <= 0 || hei <= 0)
+      continue;
+    newrects[nnewrects].x = x1;
+    newrects[nnewrects].y = y1;
+    newrects[nnewrects].width = wid;
+    newrects[nnewrects].height = hei;
+    ++nnewrects;
+  }
+
+  // Set region
+  XFixesSetRegion(ps->dpy, region, newrects, nnewrects);
+
+resize_region_end:
+  cxfree(rects);
+  free(newrects);
+}
+
+/**
+ * Dump a region.
+ */
+static inline void
+dump_region(const session_t *ps, XserverRegion region) {
+  int nrects = 0;
+  XRectangle *rects = NULL;
+  if (!rects && region)
+    rects = XFixesFetchRegion(ps->dpy, region, &nrects);
+
+  printf_dbgf("(%#010lx): %d rects\n", region, nrects);
+  if (!rects) return;
+  for (int i = 0; i < nrects; ++i)
+    printf("Rect #%d: %8d, %8d, %8d, %8d\n", i, rects[i].x, rects[i].y,
+        rects[i].width, rects[i].height);
+  putchar('\n');
+  fflush(stdout);
+
+  cxfree(rects);
+}
+
+/**
+ * Check if a region is empty.
+ *
+ * Keith Packard said this is slow:
+ * http://lists.freedesktop.org/archives/xorg/2007-November/030467.html
+ *
+ * @param ps current session
+ * @param region region to check for
+ * @param pcache_rects a place to cache the dumped rectangles
+ * @param ncache_nrects a place to cache the number of dumped rectangles
+ */
+static inline bool
+is_region_empty(const session_t *ps, XserverRegion region,
+    reg_data_t *pcache_reg) {
+  int nrects = 0;
+  XRectangle *rects = XFixesFetchRegion(ps->dpy, region, &nrects);
+
+  if (pcache_reg) {
+    pcache_reg->rects = rects;
+    pcache_reg->nrects = nrects;
+  }
+  else
+    cxfree(rects);
+
+  return !nrects;
+}
+
+/**
+ * Add a window to damaged area.
+ *
+ * @param ps current session
+ * @param w struct _win element representing the window
+ */
+static inline void
+add_damage_win(session_t *ps, win *w) {
+  if (w->extents) {
+    add_damage(ps, copy_region(ps, w->extents));
+  }
+}
+
+#if defined(DEBUG_EVENTS) || defined(DEBUG_RESTACK)
+static bool
+ev_window_name(session_t *ps, Window wid, char **name);
+#endif
+
+inline static void
+ev_handle(session_t *ps, XEvent *ev);
+
+static bool
+fork_after(session_t *ps);
+
+#ifdef CONFIG_LIBCONFIG
+/**
+ * Wrapper of libconfig's <code>config_lookup_int</code>.
+ *
+ * To convert <code>int</code> value <code>config_lookup_bool</code>
+ * returns to <code>bool</code>.
+ */
+static inline void
+lcfg_lookup_bool(const config_t *config, const char *path,
+    bool *value) {
+  int ival;
+
+  if (config_lookup_bool(config, path, &ival))
+    *value = ival;
+}
+
+/**
+ * Wrapper of libconfig's <code>config_lookup_int</code>.
+ *
+ * To deal with the different value types <code>config_lookup_int</code>
+ * returns in libconfig-1.3 and libconfig-1.4.
+ */
+static inline int
+lcfg_lookup_int(const config_t *config, const char *path, int *value) {
+#ifndef CONFIG_LIBCONFIG_LEGACY
+  return config_lookup_int(config, path, value);
+#else
+  long lval;
+  int ret;
+
+  if ((ret = config_lookup_int(config, path, &lval)))
+    *value = lval;
+
+  return ret;
+#endif
+}
+
+static FILE *
+open_config_file(char *cpath, char **path);
+
+static void
+parse_cfg_condlst(session_t *ps, const config_t *pcfg, c2_lptr_t **pcondlst,
+    const char *name);
+
+static void
+parse_config(session_t *ps, struct options_tmp *pcfgtmp);
+#endif
+
+static void
+get_cfg(session_t *ps, int argc, char *const *argv, bool first_pass);
+
+static void
+init_atoms(session_t *ps);
+
+static void
+update_refresh_rate(session_t *ps);
+
+static bool
+swopti_init(session_t *ps);
+
+static void
+swopti_handle_timeout(session_t *ps, struct timeval *ptv);
+
+#ifdef CONFIG_VSYNC_OPENGL
+/**
+ * Ensure we have a GLX context.
+ */
+static inline bool
+ensure_glx_context(session_t *ps) {
+  // Create GLX context
+  if (!ps->glx_context)
+    glx_init(ps, false);
+
+  return ps->glx_context;
+}
+#endif
+
+static bool
+vsync_drm_init(session_t *ps);
+
+#ifdef CONFIG_VSYNC_DRM
+static int
+vsync_drm_wait(session_t *ps);
+#endif
+
+static bool
+vsync_opengl_init(session_t *ps);
+
+static bool
+vsync_opengl_oml_init(session_t *ps);
+
+static bool
+vsync_opengl_swc_init(session_t *ps);
+
+static bool
+vsync_opengl_mswc_init(session_t *ps);
+
+#ifdef CONFIG_VSYNC_OPENGL
+static int
+vsync_opengl_wait(session_t *ps);
+
+static int
+vsync_opengl_oml_wait(session_t *ps);
+
+static void
+vsync_opengl_swc_deinit(session_t *ps);
+
+static void
+vsync_opengl_mswc_deinit(session_t *ps);
+#endif
+
+static void
+vsync_wait(session_t *ps);
+
+static void
+init_alpha_picts(session_t *ps);
+
+static bool
+init_dbe(session_t *ps);
+
+static void
+init_overlay(session_t *ps);
+
+static void
+redir_start(session_t *ps);
+
+static void
+redir_stop(session_t *ps);
+
+static inline time_ms_t
+timeout_get_newrun(const timeout_t *ptmout) {
+  return ptmout->firstrun + (max_l((ptmout->lastrun + (time_ms_t) (ptmout->interval * TIMEOUT_RUN_TOLERANCE) - ptmout->firstrun) / ptmout->interval, (ptmout->lastrun + (time_ms_t) (ptmout->interval * (1 - TIMEOUT_RUN_TOLERANCE)) - ptmout->firstrun) / ptmout->interval) + 1) * ptmout->interval;
+}
+
+static time_ms_t
+timeout_get_poll_time(session_t *ps);
+
+static void
+timeout_clear(session_t *ps);
+
+static bool
+tmout_unredir_callback(session_t *ps, timeout_t *tmout);
+
+static bool
+mainloop(session_t *ps);
+
+#ifdef CONFIG_XINERAMA
+static void
+cxinerama_upd_scrs(session_t *ps);
+#endif
+
+/**
+ * Get the Xinerama screen a window is on.
+ *
+ * Return an index >= 0, or -1 if not found.
+ */
+static inline void
+cxinerama_win_upd_scr(session_t *ps, win *w) {
+#ifdef CONFIG_XINERAMA
+  w->xinerama_scr = -1;
+  for (XineramaScreenInfo *s = ps->xinerama_scrs;
+      s < ps->xinerama_scrs + ps->xinerama_nscrs; ++s)
+    if (s->x_org <= w->a.x && s->y_org <= w->a.y
+        && s->x_org + s->width >= w->a.x + w->widthb
+        && s->y_org + s->height >= w->a.y + w->heightb) {
+      w->xinerama_scr = s - ps->xinerama_scrs;
+      return;
+    }
+#endif
+}
+
+static void
+cxinerama_upd_scrs(session_t *ps);
+
+static session_t *
+session_init(session_t *ps_old, int argc, char **argv);
+
+static void
+session_destroy(session_t *ps);
+
+static void
+session_run(session_t *ps);
+
+static void
+reset_enable(int __attribute__((unused)) signum);